Indenting paper



C. A. BAHR INDENTING PAPER Jan. 2, 1934.

Filed July 8, 1932 2 Sheets-Sheet l 6 Q W m BHDGB EGG-UH.

INVEN TOR. M [Z (7% ATTORNEYS Jan. 2, 1934. c. A. BAHR 1,941,783

INDENTING PAPER Filed July 8, 19:52 2 Sheets-sheaf. 2

INVENTOR.

ATTORNEYS Patented Jan. 2, 1934 PATENT OFFICE INDENTING PAPER Charles A. Bahr, Marion, Ind., assignor to William H. Ellis, Jr., Glendale, Ohio Application July s, 1932. Serial No. 621,442

12 Claims.

My invention relates to machines and methods for forming indented paper with small sized indentations therein, and. pasting plies of the paper together.

An application, Serial No. 503,517, filed December 19, 1930, by William H. Ellis, Jr., has described a plural ply sheet of indented paper in which the indentations are of such small size that in pasting the sheets together like patterns of indentations cannot, in commercial practice, be prevented from nesting into each other, and in which application the said Ellis provides for the several sheets to be pasted having indentations which will not match and nest.

It is the object of my invention to provide mechanism and a method for forming indented paper in such a way as to provide sheets which have no matching indentations, and to paste the sheets together, all on one machine.

A particular feature of my invention is that I provide, at a suitable point in the dryer system forming part of the paper machine, for a plurality of sets of indenting rolls which may be selectively applied to a sheet passing continuously over the dryers without breaking the sheet. It is also a particular object of my invention to make provision whereby the heat incident to drying the indented paper on the dryers will facilitate the drying of the pasted sheets and the establishment of a satisfactory bond when ordinary adhesive material is employed.

I accomplish my invention by that certain construction and arrangement of parts and method of procedure of which I will describe a typical example, said example being illustrated in the attached drawings. The novelty inherent in the invention, whatever may be the particular form that it takes, is set forth in the appended claims.

I In the drawings:

Figure 1 is a side elevation, partially diagrammatic, of a machine according to my invention.

Figure la is a side elevation of the right hand end part of the apparatus shown in Figure 1.

Figure 2 is a plan view showing two styles of indenting rolls, such as may be used in the practice of my invention.

Figure 3 is a partial enlarged cross section on line 3-3 of Figure 5, illustrating the respective dimensions of gear teeth and pins of the indenting roll structure. a

Figure 4 is a side elevation, and Figure 5 a front elevation, illustrating the prior mode of driving and separating the pairs of indenting rolls.

It will be understood that I apply my invention to the usual dryers employed in paper machinery, which take the fresh sheet as it is formed and dry it, ready for fabrication or shipment. I have shown in Figure 1 a sheet of paper 1, which has been formed and is ready for drying. I have illustrated press rolls 2--2, and a series of dryers 3, of which there may be any desired number, there being no attempt to show in the drawings all of the drying rolls which will ordinarily'be employed.

At a point intermediate the train of drying rolls, I provide suitable standards or housings 4 which contain the journal boxes for, in this case, two sets of indenting rolls 5-5 and 6-6. I

I- have illustrated more or less diagrammatical- 7o 1y, typical constructions such as can be provided for the rolls 5-5 and 6-6. In Figure 2 it will be noted that the roll 5 has rows of pins or projections 5a extending from its periphery, the rows of pins longitudinally of the roll being farther apart than the rows of pins circumferentially of the roll. With roll 6, however, the pins 6a are so arranged as to be closer together in the rows longitudinally of the roll than in the first instance and farther apart in the rows circumferentially 30 of the roll than in the first instance. Any two non-matching patterns will serve, however.

The product which has been indented by rolls 5--5 will not mesh with the product which has been indented by rolls 6-6 in the pasting operation, because the resulting indentations in the one case will be slightly longer than they are wide, and in the other case, slightly wider than they are long. However, the indentations are so small that they would mesh in any machine pasting operation if they were such as to match with each other.

As a convenient mode of arranging the indenting rolls, I provide a frame 20 at a convenient point in the dryer frame on which are mounted the housings 21--22 for two sets of indenting rolls. In the housings are fixed journals 23 for the lower indenting rolls of each pair, and sliding journals 24 for the upper roll of each pair.

The spindles 24, 25, of the lower and upper indenting rolls, pass through the respective journals at one side of the machine and are equipped with gears 26, 27. These gears have teeth 26a, 27a which are so arranged that the pins of the indenting rolls are multiples of the gear teeth, whereby, when the gears are in mesh, the pins will also be in mesh; but the gear teeth 26a and 27a being longer than the pins 5a and aid, as seen in Fig. 3, the upper gear 27 can be driven by the 1m lower gear 26 prior to the indenting pins coming into mesh.

The spindles 24 of the lower indenting roll or each pair are equipped with a pulley 28, whereby the lower roll is driven at the peripheral speed of the dryers through the common driving mechamsm.

In order to move the journal for the upper set of indenting rolls so as to remove them from mesh with each other, means is provided as follows: The journals are equipped with rack arms 29 extending vertically upward through the housing 21, the rack teeth being turned inwardly. A counter shaft 30 is mounted on top of the housing and equipped at one end with a hand wheel 31. On the counter shaft are a pair of pinions 32, one meshing with each rack. The result of this is that when the hand wheel is turned, the pair of journals for the upper indenting roll are raised or lowered, as the case may be. Upon lowering the upper roll in any instance, the first thing that comes into mesh are the gear teeth, which sets the upper indenting roll into operation; and as the lowering action is continued, the indenting pins come into mesh with each other.

Since the lower indenting roll of each pair is always driven, the web of paper 1 can pass over the inactive indenting roll without injury. Accordingly, the sheet 1 is led between the two sets of rolls, and, depending upon the indentation which it is desired to apply, the upper roll of that set is lowered, and this arrangement can be shifted and indentation begun without breaking the sheet on the other set of rolls at any time that it is desired.

After the sheet of paper 1 has been indented by whichever set of rolls is desired, it passes over further dryers 3 and from them to suitable reels. I have indicated a vertical set of reels, 33, 34, 35 and 36 mounted on standards 37, although a horizontal set of reels would also be satisfactory. The sheet of indented paper is wound on whichever reel is selected, as will be more fully developed below. .As a simple form of paster, I provide for two sets of draw rolls 8 and 9, a glue pan, and roll 10, and pressure rollers 11, 12 and 13. I also provide for a pressure table 14 and additional draw rolls 15, shown in Figure 1a, although the pressure table 14 may not be required or may be supplemented with a series of pressure rolls. When two sheets of paper a and b are fed to the paster, the top sheet (1 receives suitable adhesives on its under side from the glue pan and the two sheets then travel between the pressure rollers 11, 12 and 13, where they are pressed together, whereupon they pass over the pressure table 14, drawn along by the feed rolls 15. The pasting equipment itself forms no part of my invention, and any desired construction used in pasting of paperboard may be alternately employed. I have indicated at 16 a shears for cutting the product up into sheets as it emerges from the paster.

A very great advantage in connection with arranging the indenting mechanism with wheels and a paster is, that it eliminates the necessity for setting up and aligning the sheets to be pasted, such as would inevitably be necessary were the reels of indented paper to be transported from one part of the mill to another before being pasted.

One method of using the apparatus will be to start by applying the indenting rolls 55 to the sheet as it passes through the dryers, and winding up the sheet on the reel 1'7. Without breaking the sheet, the upper indenting roll 5 s raised and the upper indenting roll 6 is lowered, thus producing another pattern of indented paper. When the new type of indentation reaches the reel, the sheet is cut and the second or type 6 indentation is wrapped up on reel 18. Reels 19 and 20 can be provided with indentations 5 and. 6 in the same manner as reels 17 and 18.

While reels 19 and 20 are being filled, reels 17 and 18 can be unwound, the sheets thereon passed respectively through the feed. rolls 3 and 9 and pasted indented boards formed on the pasting unit. When this pasting has been finished, reels l9 and 20 will be ready for pasting, and reels 17 and 18 empty, so that they can be provided with a new supply.

In this way the paper is passed from the reels to the paster while it is still hot, since as soon as a set of reels is filled, the paper is ready for pasting.

Another way of using the apparatus would be to fill reels 17, 18, 19 and 20 with indented paper of type 5, and then start to make indented paper of type 6, so that the lower web may pass, as indicated by dotted lines at 1a, directly to the paster from the last reel. This practice can be continued until the four reels of paper of indentation number 5 are pasted up to indented paper of style 6, whereupon the whole series of steps will be repeated. In this way the sheet brought directly from the dryer retains a very considerable heat and will give an enhanced adhesion of the indented layers together, even though the stored reels have lost some of their heat.

It will be apparent from the claims that follow that I regard my invention as including a wide range of equivalents, since I have in said claims set forth what my invention is, largely irrespective of the precise form selected for illustration.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:--

1. In combination, dryer mechanism and indenting mechanism, said indenting mechanism comprising a plurality of indented pattern forming elements selectively applicable to a sheet of paper passing through said mechanisms.

2. In combination, dryer mechanism, paster mechanism, and indenting mechanism, said indenting mechanism comprising a plurality of indented pattern forming elements selectively applicable to a sheet of paper passing through said mechanisms.

3. In combination, dryer mechanism and indenting mechanism, said indenting mechanism comprising a plurality of indented pattern forming elements through each of which a sheet being dried passes at all times, said elements being selectively applicable to the sheet, for the purpose described.

4. In combination, dryer mechanism, paster mechanism, and indenting mechanism, said indenting mechanism comprising a plurality of indented pattern forming elements through each of which a sheet being dried passes at all times said elements being selectively applicable to the sheet, for the purpose described.

5. An indenting mechanism for paperboard comprising a series of pairs of indenting rolls between which a sheet to be indented is passed, one of the rolls of each pairbeing movable so as to selectively separate the pairs which it is not desired to apply to the sheet.

6. An indenting mechanism for paper board comprising a series of pairs of indenting rolls between which a sheet to be indented is passed, the

lower one of each set of rolls being driven, and the upper one of each set of rolls being driven by the lower roll, intermeshing gears on said rolls, in-

denting pins on said rolls, the gear teeth being i longer than the indenting pins, for the purpose described.

7. In combination, a dryer and indenting mechanism arranged to produce a plurality of indented patterns in paper board, reels for accumulating the indented material produced, and a pasting mechanism, said pasting mechanism and reel structure being permanently associated with the drying and indenting mechanism, whereby the indented sheets may be formed, accumulated and pasted without transportation from one place to another.

8. In combination, a dryer mechanism and indenting mechanism, a reel mechanism, and a pasting mechanism arranged in a thick series for successive application to a sheet of paper passing through said assembled mechanism.

9. An indenting mechanism comprising housings, and fixed journals in said housings, a lower indenting roll mounted in said fixed journals, sliding journals in said housings, an upper indenting roll mounted in said'sliding journals, means for moving the sliding journals upwardly to separate the indenting rolls, and driving means for said rolls arranged to set the rolls into rotation with each other prior to meshing or the rolls with each other.

10. An indenting mechanism comprising housings, and fixed journals in said housings, a lower indenting roll mounted in said fixed journals,

sliding journals in said housings, an upper indenting roll'mounted in said sliding journals, means for moving the sliding journals upwardly to separate the indenting rolls, and driving means for said rolls arranged to set the rolls into rotation with each other prior to meshing of the rolls with each other, comprising gears on said rolls meshing with each other, means for driving one of the rolls, the teeth of the gears being of greater height than the indentingmechanism on said rolls.

11. An indenting mechanism comprising housings, and fixed journals in said housings, a lower indenting roll mounted in said fixed journals, sliding journals in said housings, an upper indenting roll mounted in said sliding journals, means for moving the sliding journals upwardly to separate the indenting rolls, and driving means for said rolls arranged to set the rolls into rotation with each other prior to meshing of the rolls with each other, comprising gears on said rolls meshing with each other, means for driving one of the rolls, the teetl of the gears being of greater height than the indenting mechanism on said rolls, and means for moving the sliding journals comprising racks projecting from said journals and a common shaft havingpinions meshing with said racks.

12. A mechanism for forming indented paper of a plurality of patterns, reels for accumulating said paper, and a pasting mechanism, said parts arranged in a permanent series for successive application with paper without transporting same from place to place.

CHARLES A. BAHR. 

